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While I was driving to the airport a layer of radiation fog condensed and became a pattern-smashing iron plate by flight time. While waiting for tower to cut the next ATIS, I poked around weather forecasts and noticed that the MOS forecast predicted, correctly, low ceilings for the rest of the morning. Argh!

Gemini Sparkle

Key Takeaways:

  • Model Output Statistics (MOS) and the Localized Aviation MOS Program (LAMP) provide detailed, airport-specific weather forecasts, similar to TAFs, for approximately 1700 airports lacking official TAFs, with LAMP offering hourly updates.
  • These forecasts are generated by applying statistical models to broader weather data (like the GFS model), incorporating local observations and geo-climatic data to deliver granular predictions for various meteorological parameters.
  • While valuable for enhancing situational awareness, validating official forecasts, and applying personal minimums, MOS/LAMP reports are not legal replacements for official TAFs or Graphical Area Forecasts for flight planning and can have accuracy limitations during highly irregular weather conditions.
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Those extra 30 ponies up front on the mighty Cessna 172SP tend to cause nosewheel landings—at least they do for me—and it was time to go out and knock the rust off my landings to keep the nosewheel safe. I awoke to a sunny morning after showers the previous evening and clicked through the weather while sipping my morning coffee. METAR green, nearest TAFs green, I was ready to go.

While I was driving to the airport a layer of radiation fog condensed and became a pattern-smashing iron plate by flight time. While waiting for tower to cut the next ATIS, I poked around weather forecasts and noticed that the MOS forecast predicted, correctly, low ceilings for the rest of the morning. Argh!

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